ESP8266 Client Probleme

[Andy (Gast)]

Hallo zusammen,

ich habe einen ESP8266 als Accesspoint mit Server konfiguriert (in 
Arduino) mit dem sich eine LED schalten lässt. Rufe ich über den Browser 
die URL: "http://192.168.4.1/?pin=FUNCTION1ON"; auf geht die LED an.
Ein zweiter ESP8266 soll als Client Befehle an den Server schicken, um 
die LED zu schalten. Der Client verbindet sich auch mit dem WLAN (ich 
bekomme die Rückmeldung "Connected!" und i=1 bzw i=0, siehe Code), 
allerdings reagiert der Server nicht auf den ESP. Ich habe mittlerweile 
so viel rumprobiert, aber leider ohne Erfolg. Ich würde mich freuen wenn 
mir jemand weiterhelfen könnte. Danke schonmal!

Server: vereinfacht, da SPAM Filter auf den Code anschlägt...

/*--------------------------------------------------
HTTP 1.1 Webserver as AccessPoint for ESP8266 
for ESP8266 adapted Arduino IDE

by Stefan Thesen 08/2015 - free for anyone

Does HTTP 1.1 with defined connection closing.
Handles empty requests in a defined manner.
Handle requests for non-exisiting pages correctly.

This demo allows to switch two functions:
Function 1 creates serial output and toggels GPIO2
Function 2 just creates serial output.

Serial output can e.g. be used to steer an attached
Arduino, Raspberry etc.
--------------------------------------------------*/

#include <ESP8266WiFi.h>

const char* ssid = "ESP-Accesspoint";
const char* password = "12345678";  // set to XX for open access point w/o passwortd

unsigned long ulReqcount;


// Create an instance of the server on Port 80
WiFiServer server(80);

void setup() 
{
  // setup globals
  ulReqcount=0; 
  
  // prepare GPIO2
  pinMode(2, OUTPUT);
  digitalWrite(2, 0);
  
  // start serial
  Serial.begin(9600);
  delay(1);
  
  // AP mode
  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssid, password);
  server.begin();
}

void loop() 
{ 
  // Check if a client has connected
  WiFiClient client = server.available();
  if (!client) 
  {
    return;
  }
  
  // Wait until the client sends some data
  Serial.println("new client");
  unsigned long ultimeout = millis()+250;
  while(!client.available() && (millis()<ultimeout) )
  {
    delay(1);
  }
  if(millis()>ultimeout) 
  { 
    Serial.println("client connection time-out!");
    return; 
  }
  
  // Read the first line of the request
  String sRequest = client.readStringUntil('\r');
  //Serial.println(sRequest);
  client.flush();
  
  // stop client, if request is empty
  if(sRequest==XX)
  {
    Serial.println("empty request! - stopping client");
    client.stop();
    return;
  }
  
  // get path; end of path is either space or ?
  // Syntax is e.g. GET /?pin=MOTOR1STOP HTTP/1.1
  String sPath=XX,sParam=XX, sCmd=XX;
  String sGetstart="GET ";
  int iStart,iEndSpace,iEndQuest;
  iStart = sRequest.indexOf(sGetstart);
  if (iStart>=0)
  {
    iStart+=+sGetstart.length();
    iEndSpace = sRequest.indexOf("X",iStart);
    iEndQuest = sRequest.indexOf("?",iStart);
    
    // are there parameters?
    if(iEndSpace>0)
    {
      if(iEndQuest>0)
      {
        // there are parameters
        sPath  = sRequest.substring(iStart,iEndQuest);
        sParam = sRequest.substring(iEndQuest,iEndSpace);
      }
      else
      {
        // NO parameters
        sPath  = sRequest.substring(iStart,iEndSpace);
      }
    }
  }

   ///////////////////////////////////////////////////////////////////////////////
  // output parameters to serial, you may connect e.g. an Arduino and react on it
  ///////////////////////////////////////////////////////////////////////////////
  if(sParam.length()>0)
  {
    int iEqu=sParam.indexOf("=");
    if(iEqu>=0)
    {
      sCmd = sParam.substring(iEqu+1,sParam.length());
      Serial.println(sCmd);
    }
  }
  
.......

 //////////////////////
    // react on parameters
    //////////////////////
    if (sCmd.length()>0)
    {
      // write received command to html page
      sResponse += "Kommando:" + sCmd + "<BR>";
      
      // switch GPIO
      if(sCmd.indexOf("FUNCTION1ON")>=0)
      {
        digitalWrite(2, 1);
      }
      else if(sCmd.indexOf("FUNCTION1OFF")>=0)
      {
        digitalWrite(2, 0);
      }
    }
    
........

Client:

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

const char* ssid = "ESP-Accesspoint";
const char* password = "12345678";
int i=1;

void setup (){

Serial.begin(115200);
WiFi.begin(ssid, password);

 while (WiFi.status() != WL_CONNECTED) {

delay(1000);
Serial.println("Connecting..");

}

}

void loop() {

if(WiFi.status()== WL_CONNECTED){   //Check WiFi connection status
Serial.println("Connected!");
HTTPClient http;  //Declare an object of class HTTPClient

if(i==1){
  i=0;
  http.begin("http://192.168.4.1:80/?pin=FUNCTION1ON");  //Specify request destination
  Serial.println("i=1");
}
else{
  i=1;
  http.begin("http://192.168.4.1:80/?pin=FUNCTION1OFF");  //Specify request destination
  Serial.println("i=0");
}
int httpCode= http.GET();                                                                   //Send the request

if(httpCode>0){    //Check the returning code

String payload = http.getString();   //Get the request response payload
Serial.println(payload);                     //Print the response payload
}

http.end();   //Close connection

}

delay(5000);    //Send a request every 30 seconds

}